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If 50- to 70-percent of your lawn area is covered with crabgrass, you should spray the entire lawn according to label instructions for the most efficient approach, says Waltz. Mow your grass.
For example, Elkins et al. (1983) examined the use of tall fescue (Festuca arundinacea), smooth bromegrass (Bromus inermis), and orchargrass (Dactylis glomerata) as living mulches. They found that herbicides killed 50% to 70% of the mulches but corn yield was reduced 5% to 10% at the end of the harvest.
Don’t let the grass stay too wet for too long. Most pathogens need 12 hours of moisture to take hold. “We can’t control the temperature or the type of grass we have, but we can control when ...
How to Prevent Crabgrass. Certain lawns are more likely to get crabgrass, including those in full sun, areas where the soil has been compacted by heavy traffic, and in lawns that are sparse ...
Tall fescue is a long-lived tuft-forming perennial (called a bunchgrass in the US), with erect to spreading hollow flowering stems up to about 165 cm (5'6") tall (exceptionally up to 200 cm) which are hairless (glabrous), including the leaf sheaths, but with a short (1.5 mm) ligule and slightly hairy (ciliate) pointed auricles that can wrap slightly around the stem.
Brown patch symptoms differ depending on the various maintenance practices performed on the turfgrass (mowing height, fertilizer, watering, etc.) Symptoms on turfgrasses that are wet for extended periods and are closely mowed will produce a distinctive gray-purplish bordered ring "smoke-ring" that is up to 50 cm in diameter. [3]
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